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Semmy [17]
3 years ago
5

Your school is choosing a new school mascot to represent all team sports. which group should you ask to get a random sample of s

tudent opinion A. students on the basketball team B. every 10th students that enters the cafeteria C.the first 20 seniors at the library D. students on the cheerleading squad
Mathematics
1 answer:
ser-zykov [4K]3 years ago
5 0
Answer: B. Every 10th students that enters the cafeteria

Explanation:

B is a random sample, while A, C, and D are biased.
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Given certain information, what is the value of x4-y4?
Pepsi [2]

Well right off the bat, I can see a good reason why it should boggle.

If (x+y)=6 and (x-y)=2, then (x+y)(x-y) would be 12. It can't be 20.

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3 years ago
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alexandr402 [8]

Answer:

4

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4 years ago
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8 0
4 years ago
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Based on the information marked in the diagram, ABC and DEF must be congruent.
drek231 [11]

Answer:

Option A is correct

True, ΔABC and ΔDEF must be congruent.

Explanation:

LA theorem or Postulates states that given two right triangles,  where one acute angle and a leg of one of the triangles are congruent to  an angle and a leg of the other triangle, then the two triangles are congruent.

In  ΔABC and ΔDEF

AB = DE              [Leg]                [Given in the figure]

\angle BAC = \angle EDF = 90^{\circ}     [Given]

\angle BCA = \angle EFD   [Acute angle]        [Given in the figure]

Then, by the LA theorem or Postulates;

therefore, ΔABC \cong ΔDEF .





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Feliz [49]

Answer:

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3 years ago
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